ALBANY – A top aide to state Economic Development Director Charles Gargano has been busted by State Police on public-lewdness charges, officials said yesterday.

Deputy Commissioner for Intergovernmental Relations Ronald O’Brien, 39, was picked up in a men’s room in the Empire State Plaza after he “displayed his genitals in a lewd manner” to an undercover state trooper, officials said.

State Police Capt. Gerald Meyer said O’Brien was one of several people arrested Dec. 23 in an ongoing crackdown on homosexual activity in men’s rooms in and near the state Capitol. The crackdown has resulted in dozens of arrests.

O’Brien, who has worked for the state since 1995 and currently earns $82,160 a year, was charged with public lewdness. A court spokesman said his case was adjourned to an undetermined date.

Gargano spokeswoman Caroline Quartararo said O’Brien “is on vacation” and cannot be reached for comment.